Merits and Limitations of Concurrent Deviation Method

Merits

2. When the number of items is very large, this method may be used to form a quick idea
about the degree of relationship before making use of more complicated methods.

Limitations.

1. This method does not differentiate between small and big changes. For example, if X increases from 100 to 101 the sign will be plus and if Y increases from 60 to 160 the sign will be plus. Thus both get equal weight when vary in the same direction.

2. The results obtained by this method are only a rough indicator of the presence or absence of correlation.

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